Internal positioning grating steel frame for secondary lining

Abstract

The utility model relates to a secondary lining inner positioning grating steel frame. An existing grating steel frame is prone to deviation in the erecting and secondary lining pouring process. The utility model comprises three main ribs which are parallel to each other, one main rib is arranged on the inner side, two main ribs are arranged on the outer side, and the cross section is triangular; a web reinforcement frame is arranged among the three main reinforcements, and the web reinforcement frame is connected with the main reinforcements through an outwards-extending puncture-proof positioning bracket; and the end part of the overhanging stab-resistant positioning bracket is provided with an overhanging support rod. The length of the overhanging stab-resistant positioning support can be adjusted by adjusting the threaded sleeve, so that the overhanging stab-resistant positioning support is supported on the surface of a waterproof plate between a secondary lining and a primary support, the grating steel frame is effectively and accurately positioned, the grating steel frame is prevented from deviating in the erecting and secondary lining pouring process, and the overhanging stab-resistant positioning support is safe, reliable and high in practicability. And construction and installation are convenient.

Description

TECHNICAL FIELD

[0001] The utility model relates to tunnel engineering technical field, concretely relates to a secondary lining in positioning grid steel frame. BACKGROUND

[0002] In the process of high-speed railway tunnel construction, in order to meet the requirement of catenary suspension point erection, it is necessary to add grid steel frame in secondary lining plain concrete section to strengthen the stiffness of plain concrete. The grid steel frame includes a plurality of main reinforcement arranged in parallel and is connected into a frame body by web reinforcement.

[0003] Because the size of the grid steel frame is small, and the section where the grid steel frame needs to be erected is not concentrated in the tunnel, it is not convenient to position and install the grid steel frame by longitudinal connection method to accurately fix the grid steel frame at the specified position. In the process of secondary lining pouring, the grid steel frame that is not fixed is easy to deviate, which affects the construction quality.

[0004] Therefore, it is necessary to propose new measures to overcome the above-mentioned defects. SUMMARY

[0005] The utility model aims at providing a secondary lining in positioning grid steel frame to avoid deviation of the grid steel frame during erection and secondary lining pouring.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0007] A secondary lining in positioning grid steel frame, the grid steel frame includes three main reinforcement arranged in parallel, one arranged on the inner side and two arranged on the outer side, and the cross section is triangular;

[0008] Web reinforcement frame is arranged between the three main reinforcement, and the web reinforcement frame and the main reinforcement are connected to each other through the outwardly extending anti-puncture positioning support;

[0009] The end of the outwardly extending anti-puncture positioning support has an outwardly extending support rod.

[0010] Further, the web reinforcement frame includes two transverse reinforcement and four inclined reinforcement;

[0011] One end of the four inclined reinforcement forms a first connection node and is connected to the main reinforcement on the outer side;

[0012] The other end of the four inclined reinforcement is respectively connected to the two ends of the two transverse reinforcement to form four second connection nodes, which are all connected to the main reinforcement on the inner side.

[0013] Further, the first connection node and the second connection node are both provided with longitudinal short reinforcement.

[0014] Further, the outwardly extending anti-puncture positioning support fixes the longitudinal short reinforcement on the main reinforcement.

[0015] Further, the outer extension anti-puncture positioning support comprises an outer extension support rod, a connecting rod and a connecting fastener.

[0016] The connecting fastener is annular in whole and is fixed outside the longitudinal short rib and the main rib.

[0017] The connecting rod is U-shaped, and the bottom of the connecting rod is fixed to the top of the connecting fastener.

[0018] The outer extension support rod is connected to the top end of the connecting rod on both sides and is arranged longitudinally.

[0019] Further, the outer extension support rod is inwardly bent at the end away from the connecting rod to form an anti-puncture structure.

[0020] Further, the end of the outer extension support rod connected to the connecting rod is externally threaded, the top end of the connecting rod on both sides is externally threaded, and the outer extension support rod and the connecting rod are connected to each other through an adjusting threaded sleeve.

[0021] Further, the connecting fastener comprises a connecting base and a stirrup.

[0022] The stirrup is U-shaped, and the end of both sides is inserted into the connecting base and is fixed by a nut.

[0023] Further, the top of the connecting base is provided with a sunken groove.

[0024] Further, the outer wall of the main rib is provided with a lattice steel frame connecting plate.

[0025] Compared with the prior art, the utility model has the beneficial effects as follows:

[0026] The utility model discloses a positioning lattice steel frame in secondary lining, and the length of the outer extension anti-puncture positioning support can be adjusted through an adjusting threaded sleeve, so that the outer extension anti-puncture positioning support is supported on the waterproof board surface between the secondary lining and the primary support, accurate positioning of the lattice steel frame is realized, and the lattice steel frame is prevented from deviating during erection and secondary lining pouring, so that the utility model is safe and reliable and facilitates construction and installation. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the following embodiment or prior art description will be briefly introduced, and obviously, the drawings in the following description are only some embodiments of the utility model, and those skilled in the art can also obtain the drawings of other embodiments according to these drawings without paying creative labor.

[0028] Figure 1 It is the structural diagram of the utility model.

[0029] Figure 2 The structure diagram of the outwardly extending anti-piercing positioning support.

[0030] Figure 3 The schematic diagram of the connection between the outwardly extending support rod and the connecting rod.

[0031] Figure 4 The structure diagram of the stirrup.

[0032] Figure 5 The structure diagram of the connecting base.

[0033] Identified in the figure as:

[0034] 1-main reinforcement, 2-web support, 3-lattice steel support connecting plate, 4-outwardly extending anti-piercing positioning support;

[0035] 41-outwardly extending support rod, 42-adjusting threaded sleeve, 43-connecting rod, 44-connecting fastener;

[0036] 441-connecting base, 442-stirrup, 443-nut. DETAILED DESCRIPTION

[0037] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the accompanying drawings. The preferred embodiments of the present application are shown in the drawings. However, the present application can be realized in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0038] In the description of the present application, it should be understood that the terms "top", "bottom", "inner", "outer", "longitudinal", "transverse" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0039] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "connection", "setting" and the like should be broadly understood, for example, it can be fixedly connected, set, or detachably connected, set, or integrally connected, set. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0040] Meanwhile, in the description of the present application, the terms "first", "second", and the like are used only to distinguish descriptions, and cannot be understood as indicating or implying relative importance. Of course, such objects can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.

[0041] In the detailed description, the length direction of the main reinforcement is defined as the longitudinal direction, and the direction perpendicular thereto is defined as the transverse direction. Figure 1 The upper side in the above is defined as the outer side, and the lower side is defined as the inner side.

[0042] The utility model provides a kind of secondary lining inner positioning grid steel frame, for reinforcing secondary lining, can be accurately positioned when installation. Figure 1 The grid steel frame includes three main reinforcements 1 parallel to each other, and a web reinforcement frame 2 is arranged between the three main reinforcements 1. The web reinforcement frame 2 is connected to the main reinforcement 1 by an outwardly extending anti-puncture positioning support 4.

[0043] The outer wall of the main reinforcement 1 is provided with a grid steel frame connecting plate 3, which can be made of angle steel material and has mounting fixing holes for splicing between each grid steel frame. When installing, two grid steel frames are connected and fixed by bolts at the mounting fixing holes.

[0044] The grid steel frame designed by the utility model is a three-limb grid steel frame. Among the three main reinforcements 1, one is arranged on the inner side, i.e., close to the surrounding rock side, and the other two are arranged on the outer side, i.e., close to the free face side. The cross section is triangular.

[0045] The web reinforcement frame 2 includes two transverse reinforcements, four inclined reinforcements, and five longitudinal short reinforcements. One end of the four inclined reinforcements forms a first connection node and is connected to the main reinforcement 1 on the outer side. The other end of the four inclined reinforcements is connected to the two ends of the two transverse reinforcements, respectively, to form four second connection nodes, which are all connected to the main reinforcement 1 on the inner side. The first connection node and the second connection node are both provided with longitudinal short reinforcements.

[0046] The outwardly extending anti-puncture positioning support 4 fixes the longitudinal short reinforcement on the main reinforcement 1 and is the core component for positioning the grid steel frame. Specifically, Figure 2 The outwardly extending anti-puncture positioning support 4 includes an outwardly extending support rod 41, a connecting rod 43, and a connecting fastener 44. The connecting fastener 44 is annular in shape and is fixed to the outer side of the longitudinal short reinforcement and the main reinforcement 1. The connecting rod 43 is U-shaped, and the bottom of the connecting rod 43 is fixed to the top of the connecting fastener 44, which can be fixed by welding. The outwardly extending support rod 41 is connected to the top of the two sides of the connecting rod 43 and is arranged longitudinally. The outwardly extending support rod 41 is supported on the waterproof board surface between the secondary lining and the initial support, which can achieve the purpose of positioning the grid steel frame. In some embodiments, the outwardly extending support rod 41 and the connecting rod 43 can be made of a round steel bar with a diameter of 16 mm.

[0047] For example, Figure 3, the end of the outer extension support 41 far away from the connecting rod 43 is inwardly bent to form a stab-proof structure, so as to avoid direct contact between the sharp end and the waterproof plate between the primary support and the secondary lining, and scratch the waterproof plate structure. The end of the outer extension support 41 connected with the connecting rod 43 has external threads, the top end of the connecting rod 43 on both sides has external threads, and the outer extension support 41 and the connecting rod 43 are connected through the adjusting threaded sleeve 42. In some embodiments, the pitch of the threads can be 2.5 mm, the nominal diameter of the threads is 14.8 M, and the nominal length is 40 mm. By screwing the adjusting threaded sleeve 42, the relative distance between the outer extension support 41 and the connecting rod 43 can be adjusted, the position of the outer extension support 41 is changed, and thus the position of the grid steel frame in the secondary lining is positioned.

[0048] As Figure 4 and Figure 5 The connecting fastener 44 comprises a connecting base 441 and a stirrup 442. The stirrup 442 is in a U shape, the end portions on both sides are inserted into the connecting base 441 and are fixed through nuts 443. The connecting base 441 is provided with through holes for inserting the stirrup 442. The top of the connecting base 441 has a sunken groove, so as to increase the space on the inner side. In some embodiments, the stirrup 442 can adopt a smooth round steel with a diameter of 18 mm, and the end portion has external threads with a pitch of 2.5 mm. Correspondingly, the diameter of the nut 443 can be 18 mm, and the pitch can be 2.5 mm.

[0049] The outer extension stab-proof positioning support 4 is connected to the inner and outer sides of the grid steel frame, and suitable structural parameters can be adopted according to the sizes of different parts of the grid steel frame, so as to realize stable connection.

[0050] The utility model effectively solves the problems that the grid steel frame is difficult to erect and is not accurately positioned in the secondary lining, avoids movement of the grid steel frame during pouring of the secondary lining, and guarantees the engineering quality. The end of the connecting rod 43 far away from the outer extension support 41 is inwardly bent to form a stab-proof structure, so as to effectively avoid that the waterproof plate between the primary support and the secondary lining structure is pierced by the sharp end. The overall structure is simple, the materials are single, it is safe and reliable, and it is convenient for construction and installation.

[0051] In addition, the length of the outer extension support 41 and the connecting rod 43 can be adjusted through the adjusting threaded sleeve 42, the outer extension support 41 supports the surface of the waterproof plate between the secondary lining and the primary support, the positioning purpose of the grid steel frame is achieved, and the operation is flexible and the use range is wide.

[0052] The above describes the utility model through specific examples, which is only used to help understand the utility model and does not limit the utility model. According to the idea of the utility model, those skilled in the art of the utility model can make some simple deductions, deformation or substitution.

Claims

1. A positioning grid steel frame in secondary lining, characterized in that: the grid steel frame comprises three mutually parallel main bars (1), one arranged in the inner side and two arranged in the outer side, and the cross section is triangular; an abdominal bar frame (2) is arranged between the three main bars (1), and the abdominal bar frame (2) and the main bars (1) are connected to each other through an outwardly extending anti-piercing positioning support (4); and the end of the outwardly extending anti-piercing positioning support (4) is provided with an outwardly extending support rod (41).

2. The positioning grid steel frame in secondary lining according to claim 1, characterized in that: the abdominal bar frame (2) comprises two transverse bars and four diagonal bars; one end of the four diagonal bars forms a first connecting node and is connected to the main bar (1) arranged in the outer side; and the other end of the four diagonal bars is respectively connected to the two ends of the two transverse bars to form four second connecting nodes, which are all connected to the main bar (1) arranged in the inner side.

3. The positioning grid steel frame in secondary lining according to claim 2, characterized in that: the first connecting node and the second connecting node are both provided with a longitudinal short bar.

4. The positioning grid steel frame in secondary lining according to claim 3, characterized in that: the outwardly extending anti-piercing positioning support (4) fixes the longitudinal short bar on the main bar (1).

5. The positioning grid steel frame in secondary lining according to claim 4, characterized in that: the outwardly extending anti-piercing positioning support (4) comprises an outwardly extending support rod (41), a connecting rod (43) and a connecting fastener (44); the connecting fastener (44) is annular as a whole and is fixed on the outer wall of the longitudinal short bar and the main bar (1); the connecting rod (43) is U-shaped, the bottom of the connecting rod (43) is fixed on the top of the connecting fastener (44); and the outwardly extending support rod (41) is connected to the top end of the two sides of the connecting rod (43) and is arranged longitudinally.

6. The positioning grid steel frame in secondary lining according to claim 5, characterized in that: the outwardly extending support rod (41) is inwardly bent at the end away from the connecting rod (43) to form an anti-piercing structure.

7. The positioning grid steel frame in secondary lining according to claim 6, characterized in that: the end of the outwardly extending support rod (41) connected to the connecting rod (43) is provided with external threads, the top end of the two sides of the connecting rod (43) is provided with external threads, and the outwardly extending support rod (41) and the connecting rod (43) are connected to each other through an adjusting threaded sleeve (42).

8. The positioning grid steel frame in secondary lining according to claim 7, characterized in that: the connecting fastener (44) comprises a connecting base (441) and a stirrup (442); the stirrup (442) is U-shaped, and the end of the two sides is inserted into the connecting base (441) and is fixed by a nut (443).

9. The positioning grid steel frame in secondary lining according to claim 8, characterized in that: the top of the connecting base (441) is provided with a sunken groove.

10. The positioning grid steel frame in secondary lining according to claim 9, characterized in that: the outer wall of the main bar (1) is provided with a grid steel frame connecting plate (3). ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​

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